The reliability of the world map is really poor.
Tiles disappear/appear as you zoom in and out, it takes way too long to display a proper map and often doesn't display anything at all. I spend more time zooming in and out of the world map trying to get stuff to appear than I do actually using the world map.
I think this experience is pretty common amongst residents.
When I talk in the Second Life discord, viewer developers seem to think that it is simply 'the way it is' - 'The old image must be cached' etc.
What I'm saying is that fundamentally it seems like whatever protocol powers the world map does not seem fit for purpose. Failures are too frequent on all viewers, TPV or first party cannot reliably render the world map when opened.
I think this should be taken to the drawing board, the fundamentals and failure points assessed, and a better, more fail-safe world map protocol should be designed that will address the reliability issues of the existing design.